<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品添加</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 步骤条 -->
      <!-- :active="0" :用于指定默认激活的步骤条的索引 -->
      <el-steps
        :space="200"
        :active="+activeIndex"
        align-center
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!--
                 options用来指定数据源
                 props用来指定配置对象
             -->
              <el-cascader
                expand-trigger="hover"
                v-model="addForm.goods_cat"
                :options="catalist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableDate"
              :key="item.id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableDate"
              :key="item.id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action:表示图片上传到的后台API地址
            handlePreview:处理图片预览效果
            handleRemove:移出图片的操作
            on-success:文件上传成功时的钩子 -->
            <el-upload
              class="upload-demo"
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" width="100%" height="100%" />
    </el-dialog>
  </div>
</template>
<script>
import _ from "lodash";
export default {
  data() {
    return {
      catalist: [], //商品分类列表
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [], //商品所属的分类数组
        pic: [], //图片上传数组
        goods_introduce: "", //商品内容
        attrs:[]
      }, //添加商品的对象
      //表单验证
      addFormRules: {
        goods_name: {
          required: true,
          message: "请输入商品名称",
          trigger: "blur",
        },
        goods_price: {
          required: true,
          message: "请输入商品价格",
          trigger: "blur",
        },
        goods_weight: {
          required: true,
          message: "请输入商品重量",
          trigger: "blur",
        },
        goods_number: {
          required: true,
          message: "请输入商品数量",
          trigger: "blur",
        },
        goods_cat: {
          required: true,
          message: "请输入商品分类",
          trigger: "blur",
        },
      },
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      manyTableDate: [], //动态参数列表数据
      onlyTableDate: [], //静态属性列表
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headerObj: { Authorization: window.sessionStorage.getItem("token") },
      previewPath: "", //图片预览路径
      previewVisible: false, //控制图片预览的显示与隐藏
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败!");
      }
      this.catalist = res.data;
      console.log(res.data);
    },
    //级联选择器选中项发生变化时会触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //activeName:即将进入的标签页名字
    //oldActiveName:即将离开的标签页名字
    beforeLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类!");
        return false;
      }
    },
    //tabs栏发生切换时
    async tabClicked() {
      //切换到商品参数
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status != 200) {
          return this.$message.error("获取动态参数列表失败!");
        }
        this.manyTableDate = res.data;
        console.log(this.manyTableDate);
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        });
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status != 200) {
          return this.$message.error("获取静态属性列表失败!");
        }
        this.onlyTableDate = res.data;
        console.log(this.onlyTableDate);
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    //移出图片的操作
    handleRemove(file) {
      //console.log(file);
      //1、获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      //2、从pic数组中，找到这个图片对应的索引值
      const i = this.addForm.pic.filter((x) => x.pic === filePath);
      //3、调用数组的splice方法，把图片信息对象从pic数组中移出
      this.addForm.pic.splice(i, 1);
      console.log(this.addForm.pic);
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response);
      //1、拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      //2、将图片信息对象，push到pic数组中
      this.addForm.pic.push(picInfo);
      console.log(this.addForm);
    },
    //添加商品
     add() {
      console.log(this.addForm);
      //表单预验证
      this.$refs.addFormRef.validate(async(valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项!");
        }
        //执行添加的业务逻辑 
        //lodash cloneDeep(obj)  深拷贝
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        //处理动态参数
        this.manyTableDate.forEach(item=>{
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(" ")
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableDate.forEach(item=>{
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const {data:res} = await this.$http.post('goods',form)
        if(res.meta.status!=201){
          return this.$message.error('添加商品失败!');
        }
        this.$message.success('添加商品成功!');
        this.$router.push('/goods')
      });
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.btnAdd {
  margin-top: 20px;
}
</style>